class_docstr: Data structure holding a single PPI graph.
docstr: Node labels to predict as ndarray of shape [V, C]
docstr_tok: ["Node","labels","to","predict","as","ndarray","of","shape","[","V",",","C","]"]
code: def node_labels(self) -> np.ndarray:
      """Node labels to predict as ndarray of shape [V, C]"""
      return self._node_labels
  
file_path: ptgnn/ptgnn/implementations/ppi/dataloader.py
imports: import numpy
  from dpu_utils.utils import RichPath
  from typing import Dict, List
label_desc: Use image node_id 2 for calling the PPIGraphSample obj's underlying member method code with example usage: obj.node_labels() and returns: self